help...discolerations?

Well im very proud, yet a little ...i guess worried/insecure about my dick

first of im 7 x 6.5....love it.......BUT about half way up my shaft i have a skin discoleration with a birthmark 2 centimeters right of it...the birthmarks fine...doesnt bother me...but the skin discoleration is about 3/4 the size of a penny.....its flat and everything...just difffernet colored skin....but im just nervous about how a girl will react to it....i guess its normal in a way,...i duno...just a thought....any comments?